/roman_numerals

Programs in various languages to convert to and from roman numerals.

Primary LanguagePythonBSD 3-Clause "New" or "Revised" LicenseBSD-3-Clause

Roman Numeral Converters

This is a collection of programs in various languages to convert to and from Roman Numerals. Every version has a test suite with 100% code coverage.

Test data based on Gerard Schildberger’s list, as provided with OEIS sequence A006968.

Supported Languages

This list might grow soon...

  • Python (2 and 3) — reference implementation
  • C
  • Java
  • JavaScript
  • Ruby
  • Swift
  • Lua
  • C# — or basically the Java version with capital letters sprinkled on top
  • Go

(Most implementations started their life as a copy of the .py file, or with the .py file side-by-side.)

Testing/compiling

Run make either from the top directory or from a language directory. Requirements:

  • Python — Python and py.test installed
  • C — a C compiler installed
  • Java — Java installed, junit-4.12.jar and hamcrest-core-1.3.jar in the Java folder
  • JavaScript — node and npm installed; npm dependencies (jest) installed
  • Ruby — Ruby installed
  • Swift — Xcode installed; the included executable might work on a Mac — good luck! Apple would prefer people not to write CLI apps in Swift; their testing thing does not work.
  • Lua — Lua installed; download LuaUnit manually and place in the Lua/ directory
  • C# — Visual Studio and the appropriate C# runtimes installed (make unavailable)
  • Go — Go installed

Public API

Each version has a slightly different public API.

  • Python: to_roman(integer) — from_roman(roman)
  • C: int to_roman(int integer, char* roman) (buffer of length 16) — int from_roman(char* roman)
  • Java: String RomanNumerals.toRoman(int integer) — int RomanNumerals.fromRoman(String roman)
  • JavaScript: toRoman(integer) — fromRoman(roman)
  • Ruby: to_roman(integer) — from_roman(roman)
  • Swift: toRoman(integer: Int) — fromRoman(roman: String)
  • Lua: to_roman(integer) — from_roman(roman)
  • C#: string RomanNumerals.ToRoman(int integer) — int RomanNumerals.FromRoman(string roman)
  • Go: ToRoman(integer int) (string, error) — FromRoman(roman string) int

License

Copyright © MMXVI-MMXVIII, Chris Warrick. All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

  1. Redistributions of source code must retain the above copyright notice, this list of conditions, and the following disclaimer.

  2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions, and the following disclaimer in the documentation and/or other materials provided with the distribution.

  3. Neither the name of the author of this software nor the names of contributors to this software may be used to endorse or promote products derived from this software without specific prior written consent.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.